Merge pull request #9 from divviup/dependabot/cargo/hpke-0.9.0

Update hpke requirement from 0.8.0 to 0.9.0

Author: tgeoghegan

Cargo.toml

@@ -33,7 +33,7 @@ kem-x25519-hkdf-sha256 = ["hpke/x25519"]
 rand = "0.8.5"
 num_enum = "0.5.7"
 cfg-if = "1.0.0"
-hpke = { version = "0.8.0", default-features = false }
+hpke = { version = "0.9.0", default-features = false }
 zeroize = "1.3"
 
 [dependencies.serde_crate]